After an eternity using a laser and making sure we have a slope of 1cm per meter we now have the base layer done :) If I understand correctly I now need to rent a machine to compact everything tightly before putting the visqueen layer and the armature.
That’s exactly what I have foreseen :) I saw another post a while ago showing that and I had geotextile in excess so I used it with the remaining of the rocks we had around.